Error in backmapper

[jf-unsilo]

Hi There

I have found an error in the backmapper, that only occurs when the document is in a certain format.
If the text starts with a single character token, that token is set with a wrong begin / end when doing the backmapping (both the begin and end are set to 0). The attached example should generate a xmi where you can inspect the error.

backmapper-error-input.txt

BackmapperProblem.java.zip